Ordered these yesterday afternoon, paid extra for express delivery and boy was it express! Dumbells arrived at 1.30pm today. Set comes with a sturdy case well up to the job of transporting or storage, the dumbbells are all metal (black cast iron weights) with chromed handles and collar clamps. The set comes with a selection of weights with both metric and imperial weights sizes which build up on each dumbbell to 20kg total, 10kg each side which is enough for beginners. If you want to combine heavier weights for a single dumbbell for use in concentration curls for instance they are sturdy enough to handle it.
The dumbbells are virtually identical to more expensive branded sets I have used, and I mean identical to the point they look like they were made in the same factory! These are at least £5 cheaper than the next cast iron 20kg set on Amazon and half the price of some identical looking branded sets. At this price I doubt you can find cheaper anywhere.
I used to be into going to the gym and doing the odd weights a bit in my 20s and after a 12yr gap decided to get back into it gently with no major expense (to begin with). Knowing my dumbbells a bit I wanted cast iron ones so I could "upgrade" as I build up strength and size. These are spot on and I immediately tried out some curling sets with them.
I have to say they have not come loose at all and I know some other purchasers have reported this. They come with a rubber washer built into the collar clamp which means they do not come loose, well my ones do not anyway. One word of advice is once you tighten them spin them on the floor (clockwise) as this tightens further, just hand tightening may not be enough (learnt that with previous dumbbells like this I have used)!
All I can say is what a bargain. Delighted!